Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel (lamps H 01 J 65/00)
11
/
02
•
Details, e.g. gas filling, shape of vessel
11
/
04
•
•
Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
13
/
00
Discharge tubes with liquid-pool cathodes, e.g. metal-vapour rectifying tubes (lamps H 01 J 61/00)
13
/
02
•
Details
13
/
04
•
•
Main electrodes; Auxiliary anodes
13
/
06
•
•
•
Chathodes
13
/
08
•
•
•
•
characterised by the material
13
/
10
•
•
•
•
Containers for the liquid pool; Arrangement or mounting thereof
13
/
12
•
•
•
•
Positioning or moving the cathode spot on the surface of the pool
13
/
14
•
•
•
•
Cooling, heating, circulating, filtering, or controlling level of the liquid
13
/
16
•
•
•
Anodes; Auxiliary anodes for maintaining the discharge (screens H 01 J 13/22)
13
/
18
•
•
•
•
Cooling or heating of anodes
13
/
20
•
•
Control electrodes, e.g. grid (for igniting arrangements H 01 J 13/34)
13
/
22
•
•
Screens, e.g. for preventing or eliminating arcing-back
13
/
24
•
•
Vessels; Containers
13
/
26
•
•
Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
13
/
28
•
•
Selection of substances for gas filling; Means for obtaining or maintaining the desired pressure within the tube [2]
13
/
30
•
•
•
Means for permitting pumping during operation of the tube
